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I really support the idea about internet debates. I've even tried to organise one with Tuna's debaters, but we had to cancel it because of some technical problems we had on my faculty to establish an connection to the server.
At the time Tuna was preparing a site, where you could upload your video and another person from another part of the world would do a reply for you. I'm sure this page is still somewhere on the internet, but I'm not sure if it works. And AFAIK IDEA is doing something simmilar, if nothing else, I am sure that they are doing it with text...
It is an idea, that should be tried out, I have the server capabilities, anyone interested?